<!-- 看34 -->
<template>
    <div>
        <!-- 面包屑区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
        <!-- 提示区域 -->
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>

        <!-- 步骤条区域 -->
            
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            
            <!-- tab栏区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="TabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                                expand-trigger="hover"
                                :props="cateProps"
                                v-model="addForm.goods_cat"
                                :options="catelist"
                                @change="CateChange">
                                </el-cascader>
                            </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!-- 渲染表单的Item项 -->
                         <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                         </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="item in onlyTabData" :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!-- action 表示图片要上传到的后台API地址 -->
                        <!-- :on-preview 指定预览事件 -->
                        <el-upload
                        :action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        list-type="picture"
                        :headers="headerObj"
                        :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器组件 -->
                        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                        <!-- 添加商品的按钮 -->
                        <el-button type="primary" class="addbtn" @click="addCate">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览对话框 -->
        <el-dialog
  title="图片预览"
  :visible.sync="PreviewVisible"
  width="50%">
  <img :src="PreviewURl" alt="" class="previewImg">
</el-dialog>
    </div>
</template>

<script>
//导入 lodash包
import _ from 'lodash'

export default {
    data(){
        return{
            //商品分类列表
            catelist:[],
            activeIndex:'0',
            //添加商品的表单数据对象
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                //商品所属的分类数组
                goods_cat:[],
                //图片的数组
                pics:[],
                //商品的详情描述
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[{
                    required:true,message:'请输入商品名称',trigger:'blur'
                }],
                goods_price:[{
                    required:true,message:'请输入商品价格',trigger:'blur'
                }],
                 goods_weight:[{
                    required:true,message:'请输入商品重量',trigger:'blur'
                }],
                 goods_number:[{
                    required:true,message:'请输入商品数量',trigger:'blur'
                }],
                goods_cat:[{
                    required:true,message:'请输入商品数量',trigger:'blur'
                }]
            },
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            //动态参数列表数据
            manyTabData:[],
            //静态属性列表数据
            onlyTabData:[],
            //上传图片的URL地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            //图片上传组件的headers请求对象
            headerObj:{
                Authorization:
                window.sessionStorage.getItem('token')
            },
            PreviewURl:'',
            PreviewVisible:false
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        //获取所有商品分类数据
       async getCateList(){
            const {data:res}=await this.$http.get('categories')
            // console.log(res.data);
            if(res.meta.status!==200){
                return this.$message('获取商品分类数据失败！')
            }
            this.catelist=res.data
            console.log(this.catelist);
        },
        //级联选择器发生变化，就会出发这个函数
        CateChange(){
            if(this.addForm.goods_cat.length!==3){
                this.addForm.goods_cat=[]
            }
            // console.log(this.addForm.goods_cat);
        },
        //阻止页面切换
        beforeTabLeave(activeName,oldActiveName){
            //如果当前处在基本信息页面且商品分类未选择或者长度不等于3，则组织页面的切换
            if(oldActiveName==='0' && this.addForm.goods_cat.length!==3){
                this.$message.error('请先选择商品分类！')
                return false
            }
            // console.log(activeName);
            // console.log(oldActiveName);
        },
       async TabClicked(){
            // console.log(this.activeIndex);
            //证明访问的是商品参数页面
            if(this.activeIndex==='1'){
                // console.log('商品参数');
                const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{
                    sel:'many'
                }})
                // console.log(res.data);
                if(res.meta.status!==200){
                    return this.$message.error('获取动态参数列表失败！')
                }
                res.data.forEach(item=>{
                    item.attr_vals=item.attr_vals.length===0 ? [] :item.attr_vals.split(' ')
                })
                this.manyTabData=res.data
                console.log(this.manyTabData);
            }
            //证明访问的是商品属性页面
            else if(this.activeIndex==='2'){
                const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{params:{
                    sel:'only'
                }})
                // console.log(res.data);
                if(res.meta.status!==200){
                    this.$message.error('获取静态属性失败')
                }
                this.onlyTabData=res.data
                console.log(this.onlyTabData);
            }
        },
        //处理图片预览效果
        handlePreview(file){
            const filePath=file.response.data.url
            this.PreviewURl=filePath
            this.PreviewVisible=true
        },
        //处理移除图片的效果
        handleRemove(file){
            //1、获取将要删除的图片的临时路径
            const filePath=file.response.data.tmp_path
            //2、从 pics 数组中，找到这个图片对应的索引值
            const i = this.addForm.pics.findIndex(x=>x.pic===filePath)
            // 3、调用数组的 spilce 方法，把图片信息对象，从 pics 数组中移除
            this.addForm.pics.splice(i,1)
            console.log(this.addForm.pics);
        },
        //监听图片上传成功的事件
        handleSuccess(response){
            // console.log(response);
            //1、拼接得到一个图片信息对象
            const picInfo={pic:response.data.tmp_path}
            //2、将图片信息对象，push到pics数组中
            this.addForm.pics.push(picInfo)
            // console.log(this.addForm);
        },
        //添加商品
        addCate(){
            this.$refs.addFormRef.validate(async valid=>{
                // console.log(valid);
                if(!valid){
                   return this.$message.error('请填写必要的表单项')
                }
                //执行添加的业务逻辑
                const form =_.cloneDeep(this.addForm)
                form.goods_cat=form.goods_cat.join(',')
                //处理动态参数
                this.manyTabData.forEach(item=>{
                    const newInfo={
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals.join(' ')
                        }
                    this.addForm.attrs.push(newInfo)
                })
                //处理静态属性
                this.onlyTabData.forEach(item=>{
                    const newInfo={
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs=this.addForm.attrs
                console.log(form);

                //发起请求添加商品
                //商品的名称，必须是唯一的
                const { data:res } = await this.$http.post('goods', form)
                // console.log(res.data);
                if(res.meta.status!==201){
                    return this.$message.error('添加商品失败！')
                }
                this.$message.success('添加商品成功！')
                this.$router.push('/goods')
            })           
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
               return this.addForm.goods_cat[2]
            }
        }
    }
}
</script>

<style scoped>
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.addbtn{
    margin-top: 15px;
}
</style>